Camoid gearing



Patented 3 UNITED STATES PATENT OFFICE CAMOID GEAMNG Karl, Papello, Jena. Germany, assignor to the firm of Carl Zeiss, Jena, Germany 1 Application November 10,1937, Serial No. 173,876 1 In Germany November 27, 1936 1 4 Claims.

1 This application has been filed in Germany, NovemberZ'l, 1936.

The invention'concerns a camoid gearing having-a camoid which effects two movements and so controls a feeler movable in one direction as to displace this feeler according to a function the two variables of which determine the form 1 of the camoid. 1 1

The invention provides rotations of the camoid 1 about two axes and thus avoids the gliding friction inherent in the known camoid gearings, in

whichthe camoid is rotatable about one axis and 1 conveniently, at right angles to each other.

The accompanying drawing which illustrates the invention, shows in ,plan sectional view a constructional exampleof a, camoid gearing in 1 which the two axes of rotation of the camoid in- 'tersect each other at right angles.

A shaft 2 is rotatably mounted on a base plate and supports two loosely rotatable bearing bodies 3 and 4 fast with bevelgear wheels 5, 6 and 1, 8, respectively. The bevel gear wheels 6 0 and Tare the two crown wheels of a differential gear whose planet wheel 9 is loosely rotatable about a piny n which is so flxedto the shaft 2 that its axis intersects that of this shaft 2 at right angles. 1 The bevel gear wheel 5 is in mesh .35 with a bevel gear wheel l2 fast with a shaft l l,

and the bevellgear wheel .8 meshes with a bevel gear wheel l3 of a bearing body M so mounted on the base plate I as to be loosely rotatable about an axisX--X intersecting at right angles 4.0 the axis of the shaft2. In anaxial bore in the bearing body i4 is loosely rotatable a shaft l5 to which is screwed a bevel gear wheel IS in mesh with 'a bevel gear wheel I! fast with the shaft 2. To the shaft l5is screwed a bracket I 8,

11 45 in which a shaft 19 is mounted for rotation" about an axis Y-Y intersecting the axis XX 1 at right angles. ;The shaft) is actuated as fol- 1 lows: A spurjgearwheel 20 screwed to the shaft I9 is in mesh with a spur gear wheel 2| of a.

5o bearing body 22 loosely rotatable about a pin 23 fast with the bracket IS. A bevel sear wheel whichis dueto a rotation of the shaft 2, entails 24 of the bearing body 22 is in mesh with a bevel gear wheel 25 of the bearingbody I4. To the shaft 19 is screwed an arm 26 to which is fixed,

a, camoid 21. On the base plate l is rotatable an arm 28, which terminates in a spherical 5 feeler 29. To thearm 28 is fixeda bevel gear wheel 30 in mesh with a bevel gear wheel 3| fast with a shaft 32 rotatably mounted on the base plate I. .By means of a spring 33, the feeler 29 is continuously kept in contact with the sur 10 face of the camoid 21. 1

1 The surface of the camoid 21 is so shaped that the moveinents of the feeler 2 9 correspond to a definite functionof the angle of rotation of the The above-describedarrangement avoids that a rotation of the camoid?! about the axis X-X.

a rotation of this camoid 2! about the axis Y-,Y. The run-back differential; gear 6, 7, 9 provided to this effect can be dispensedwith when the running-back is, taken into. consideration in the form of thecamoidll.) 1 1 When the apparatus is in use, the two shafts 2 and H are to be rotated according to thetwo variables of the function underlying the form of the camoid 21, in whichfcase the shaft 32 rotates continuously accordingto the sought function.

Ic1aim: 1 1. Camoid gearing, comprising a camoid rotatable about two axes, a feeler displaceably dis: posed, and means for guiding the feeler along a predetermined path, the feeler being in contact 35 with the camoid. 1 1

2. Camoid gearing, comprising a camoid rotatable about two axes, afeeler displaceably disposed, means for guiding the feeler along a. we determined path and means for keeping the feeler in contact with the camoid. 1 1

3. Camoid gearing, comprising a camoid rotatable about two axes at right angles to eachother, a feeler displaceably 1 disposed, and means for guiding thefeeleralong a predetermined path, 5

the feeler being in contact with the camoid. 4. Camoid gearing, comprising a camoid rotatable about twoaxes, a feeler rotatable about an axis, the feeler being in contact with the camoid.

KARL PAPELLO. 

